A control device of a rolling mill includes first and second angle instruction sections that issue a first instruction to adjust an angle between an upper side pair and a lower side pair in a state in which the upper side pair has a parallel state and in a state in which the lower side pair has a parallel state; and a second instruction to tilt work rolls in a state in which an angle between backup rolls is maintained. An axial position instruction is issued to move the work rolls in a direction in which total thrust force received, by the work rolls tilted by the second instruction, from the backup rolls and a rolled material acts. The work roll pressing devices, work roll fixed position controlling devices, and shift cylinders are controlled on the basis of the first and second instructions, and the axial position instruction.
Provided is a control device for controlling a rolling machine including: a pair of rollers for rolling a metal strip; and an unwinder that includes a mandrel having a gripping part for gripping a tail end portion of the metal strip, and that unwinds the metal strip toward the pair of rollers. The control device comprises: a roller control unit configured to control rotation of the pair of rollers on the basis of the deviation between a target velocity and an actual velocity of the metal strip; and an unwinder control unit configured to control torque of the unwinder on the basis of the deviation between target tension and actual tension of the metal strip between the unwinder and the pair of rollers. The control device is configured to reduce the target velocity, or reduce the target tension, so that a circumferential velocity of the mandrel is greater than the velocity of the metal strip on the unwinding side, during a first period immediately before the tail end of the metal strip leaves the unwinder.
A metal fume reduction apparatus for a snout disposed between an outlet of a heat treatment furnace and a molten metal plating tank, includes: a main pipe part; an introduction pipe part and a return pipe part each of which is configured to couple the snout to the main pipe part so that an interior space of the snout communicates with the main pipe part; and a cooling part configured to cool a cooling target site, of the main pipe part, located between a first connection portion with the introduction pipe part and a second connection portion with the return pipe part in a longitudinal direction of the main pipe part. The cooling target site is located below the first connection portion of the main pipe part in a state where the main pipe part is coupled to the snout via the introduction pipe part and the return pipe part.
This control device for a rolling device is for controlling a rolling device that includes: a pair of rolling rolls for rolling a metal strip; and a feeding machine for feeding the metal strip toward the pair of rolling rolls. The control device comprises: a tension regulation part configured so as to reduce the feeding-side tension applied to the metal strip in a first period lasting until the tail end of the metal strip leaves the feeding machine during rolling of the metal strip between the pair of rolling rolls; and a leveling regulation part configured so as to regulate, in the first period, the leveling of the pair of rolling rolls on the basis of positions of the plate width ends of the metal strip in the plate width direction thereof on the feeding side of the pair of rolling rolls.
B21B 1/36 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a non-continuous process in reversing mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
B21C 47/00 - Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
A pickling apparatus for pickling a strip of metal being conveyed is equipped with: a pickling tank for storing an acid solution; a surrounding part disposed in the pickling tank so as to surround the strip immersed in the acid solution in the pickling tank; and an oxidant supply part for supplying a liquid oxidant toward an inside of the surrounding part.
A wiping apparatus for removing a liquid from a surface of a strip of metal being conveyed includes a wiping member having a flat face disposed to be contactable with the surface of the strip. The wiping member is formed from a graphite fiber reinforced resin composite material.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
A wiping apparatus for removing a liquid from a surface of a strip of metal being conveyed includes a first wiping member disposed to be contactable with a rolled face of the strip. The first wiping member has an oblique portion extending in a direction oblique to a strip width direction of the strip.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
B21B 1/24 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process
8.
FLAW DETECTION DEVICE, ROLLING DEVICE, FLAW DETECTION METHOD, AND ROLLING METHOD
This flaw detection device is for detecting a flaw of a work roll of a rolling mill, said flaw detection device comprising: an image data acquisition unit configured to acquire image data obtained by imaging the surface of a metal plate rolled by the work roll; a brightness level data acquisition unit configured to acquire, on the basis of the image data, brightness level data including a brightness level at each position in a conveyance direction of the metal plate; a frequency analysis unit configured to perform frequency analysis of the brightness level data to acquire a frequency spectrum; and a detection unit configured to detect a flaw of the work roll on the basis of the size of a signal of a component of a first frequency corresponding to a period of one rotation of the work roll of the frequency spectrum.
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
The present invention comprises: a plurality of hydraulic cylinders that include drive-side shift cylinders 715C, 715D and operation-side shift cylinders 715A, 715B that are configured to apply force to an upper work roll 710 in the axial direction thereof; and a hydraulic circuit that is configured to send hydraulic fluid to the plurality of hydraulic cylinders to move the drive-side shift cylinders 715C, 715D and the operation-side shift cylinders 715A, 715B in the axial direction and hold the position of the upper work roll 710 in the axial direction. The hydraulic circuit is configured such that, when only either the drive-side shift cylinders 715C, 715D or the operation-side shift cylinders 715A, 715B are applying force to the upper work roll 710 in the axial direction due to external force on the upper work roll 710 after the hydraulic circuit has held the position of the upper work roll 710 in the axial direction, the other hydraulic cylinders move in the opposite direction.
B21B 37/40 - Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
B21B 29/00 - Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls
10.
PLATE WEDGE ACQUISITION METHOD AND PLATE WEDGE RATIO CONTROL METHOD, AND PLATE WEDGE ACQUISITION DEVICE AND PLATE WEDGE RATIO CONTROL DEVICE
In the case of a rolling machine F2 stand 20, the exit-side plate wedge Δh of the F2 stand 20 and/or the exit-side plate wedge ratio Δh/h, which is the ratio between the exit-side plate wedge Δh and the exit-side plate thickness h at the widthwise center of a metal strip 1, is obtained on the basis of: a rolling load difference ratio ΔP/P, which is the ratio between the rolling load difference ΔP, which is the difference between the respective rolling loads applied to the operating and driving sides of upper and lower work rolls 23, 25, and the total rolling force P; a levelling amount ΔS, which is the difference in the spacing between the upper and lower work rolls 23, 25 on the operating side and the driving side; a meander amount ΔY of the metal strip 1 in the F2 stand 20; and a mill constant difference ΔK, which is the difference between the mill constants of the respective stands on the operating side and the driving side of the F2 stand 20.
B21B 38/02 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
11.
CONTROL DEVICE, CONTROL UNIT, SIDE GUIDE DEVICE, ROLLING MILL, AND CONTROL METHOD
This control device is for controlling a side guide device for guiding a metal belt conveyed along a conveyance line, the side guide device comprising a pair of guide parts provided on both sides of the conveyance line as well as a drive unit for moving the pair of guide parts along a width direction of the metal belt. The control device comprises a control unit configured to supply a command signal to the drive unit. The control unit is configured to supply, to the drive unit, a first command signal for moving the pair of guide parts while maintaining the distance in the width direction between the pair of guide parts so that said distance is wider than the width of the metal belt. The pair of guide parts are moved reciprocatingly along the width direction, in a region outside the range of extension of the metal belt in the width direction, the region being defined when the center of the metal belt matches the center of the conveyance line.
Provided is a method for detecting an Fe2+ion concentration and/or an Fe3+ion concentration in an acidic solution for pickling a material to be rolled, wherein the Fe2+ion concentration and/or the Fe3+ion concentration is determined on the basis of: a relational expression (1) of the Fe2+ion concentration which is a function of an electrical conductivity EC, a specific gravity d, and a hydrochloric acid concentration in the acidic solution; a relational expression (2) of the Fe3+ion concentration which is a function of the electrical conductivity EC, the specific gravity d, and the hydrochloric acid concentration in the acidic solution; a relational expression (3) of an oxidation reduction potential ORP which is a function of the Fe2+ion concentration, the Fe3+ ion concentration, and the hydrochloric acid concentration in the acidic solution; and the electrical conductivity EC, the specific gravity d, and the oxidation reduction potential ORP which are measured of the basis of the acidic solution during pickling.
This liquid adhesion suppression device is for suppressing the adhesion of liquid to the surface of a metal strip that is rolled in a rolling mill containing an upper work roll and a lower work roll, wherein the upper work roll comprises: a contact section in contact with the metal strip rolled by the rolling mill; and a noncontact section not in contact with the metal strip and positioned adjacent to the contact section in the axial direction of the upper work roll. The liquid adhesion suppression device comprises a shielding member for blocking liquid that leaks out from the gap between the upper work roll and the lower work roll, and is configured to be disposed at a location facing the noncontact section of the upper work roll on the output side of the rolling mill.
B21B 27/10 - Lubricating, cooling, or heating rolls externally
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
14.
ROLL UNIT, ROLL EQUIPMENT, DATA MEASURING METHOD, AND PRODUCT MANUFACTURING METHOD
This roll unit comprises: a roll 100 configured to be capable of spinning about an axis of rotation; chocks 110, 110A and 110B respectively provided outward of both end portions, in an axial direction, of the roll 100; and sensors 120, 120A, 120B provided respectively on surfaces of the chocks 110, 110A and 110B, for acquiring information relating to the chocks 110, 110A and 110B. As a result, the present invention provides a roll unit equipped with a sensor that is easier to replace than in the past, roll equipment, a data measuring method, and a product manufacturing method.
A rolling mill facility includes: a support part extending along a plate width direction of a steel plate to be rolled; a thickness measurement part supported by the support part and configured to measure a thickness of the steel plate; and a heating part supported by the support part at positions at both sides across the thickness measurement part in the plate width direction and configured to heat both edge portions of the steel plate.
B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 13/02 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21B 37/44 - Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
16.
APPARATUS FOR COOLING METAL STRIP, HEAT TREATMENT FACILITY FOR METAL STRIPS, AND METHOD FOR COOLING METAL STRIP
An apparatus for cooling a metal strip according to the present invention is used for the purpose of cooling a traveling metal strip; and this apparatus for cooling a metal strip comprises a plurality of nozzles which are each configured so as to spray a cooling medium onto the surface of the metal strip. The ratio La/Ln of the length La of a non-effective collision region in the traveling direction, the non-effective collision region being positioned between a pair of effective collision regions that are adjacent to each other in the traveling direction among the effective collision regions of the plurality of nozzles, to the center-to-center distance Ln of the pair of effective collision regions in the traveling direction is 0.2 to 0.6; and the effective collision regions are areas where the collision density of a liquid, which is contained in the cooling medium sprayed from the nozzles on the surface of the metal strip, on the surface is 50% or more of the maximum value thereof.
Provided are a sheet shape detecting device and a sheet shape detecting method capable of suppressing an increase in the complexity of the device and improving detection accuracy. The sheet shape detecting device (1) detects the sheet shape of a metal sheet (S) and is equipped with a roll unit (20) having a plurality of rolls (2A-2G) on which a metal sheet (S) is placed and a moving mechanism that moves a group of two or more of the plurality of rolls (2A-2G) along the axial direction as a roll group. The plurality of rolls (2A-2G) are lined up with the width direction of the metal sheet (S) as the axial direction while forming gaps (G) in the axial direction, thereby forming first regions (A1) and second regions (A2), which are longer in the axial direction than the first regions (A1), lined up in alternation in the axial direction. In the roll unit (20), first boundary portions (B1) that switch from a first region (A1) to a second region (A2) from the center portion (C) of the axial direction toward the outside are located on flat portions (21) where the radius is constant among the rolls (2), and second boundary portions (B2) that switch from a second region (A2) to a first region (A1) are located in the gaps (G) between adjacent rolls (2). The moving mechanism can switch between a first state in which the roll group is located at a first position and a second state in which the roll group is located at a second position that is moved in the axial direction from the first position by the length (L1) of the first region (A1) and less than the length (L2) of the second region (A2).
B21B 38/02 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
This cooling liquid is for cooling a steel sheet, and contains a first ion that can change, in a solution, into a first substance that generates a reducing gas through decomposition, and a second ion that can form, through reaction with ferric oxide, an iron compound or an ionic compound complex including iron. The concentration of the first ion in the cooling liquid is 0.5-6 wt% and the concentration of the second ion in the cooling liquid is 1.0-28 wt%, while the total concentration of the first ion and the second ion is 2.0-33.0 wt%.
A gear spindle device for a rolling mill includes: a spindle outer cylinder having, at a first end side, an inner circumferential surface provided with an inner circumferential gear; a spindle inner cylinder having an outer circumferential surface provided with an outer circumferential gear which engages with the inner circumferential gear; a seal member disposed between the spindle outer cylinder and the spindle inner cylinder, for holding a lubricant oil at an engagement portion between the inner circumferential gear and the outer circumferential gear; and a coolant supply unit disposed at an opposite side to the seal member across the engagement portion in an axial direction of the spindle outer cylinder, for supplying a coolant toward the spindle outer cylinder in a formation region of the engagement portion where the engagement portion is formed.
B21B 35/12 - Toothed-wheel gearings specially adapted for metal-rolling mills; Housings or mountings therefor
F16D 3/06 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
20.
WINDING DEVICE, MANDREL REPLACEMENT METHOD, AND MANDREL
A winding device 1 comprises: a mandrel 3 including a winding drum composed of a combination of segments 30; a casing 51 in which the mandrel 3 is mounted; a holding cylinder 53, between the casing 51 and the mandrel 3, that holds the mandrel 3 and rotates coaxially with the mandrel 3; and an expanding/contracting mechanism 20 that changes an outer diameter of the winding drum 30. The mandrel 3 is integrated with the expanding/contacting mechanism 20 and configured to be insertable into and removable from the holding drum 53 in the axial direction thereof.
The purpose of the present invention is to provide a welding device and a welding method with which it is possible to properly comprehend welding defects including abnormal shapes, which are linked to fold defects, and the generation of dust. This welding device 1 comprises: a welding unit 10 that joins, by means of resistance welding, a region where a first sheet member 21 and a second sheet member 22 overlap, and forms a welding region 20 along a welding direction y that crosses the sheet passing direction x of the first sheet material 21 and the second sheet material 22; a rolling reduction unit 30 that applies rolling reduction to the welding region 20; a shape acquiring unit 70 that acquires the shape of the welding region 20 before and/or after the rolling reduction has been applied by the rolling reduction unit 30; and a moving body 40 that is configured to be able to reciprocate in the welding direction y and supports the welding unit 10 and the rolling reduction unit 30 while arranging the welding unit 10 and the rolling reduction unit 30 side by side in the welding direction y.
A control device 20 obtains second pressing forces acting on work-side and drive-side roll chocks 112A and 112B on the basis of entry side and exit side first pressing forces, and controls at least one of work roll position control devices 140B and 141B and at least one of work roll pressing devices 130B and 131B changing a position of at least one of the roll chocks 112A and 112B in such a manner that a difference between the work-side second pressing force and the drive-side second pressing force is equal to or smaller than a predetermined value.
B21B 37/68 - Camber or steering control for strip, sheets or plates, e.g. preventing meandering
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
A laser processing method includes a step of processing a workpiece by relatively moving the workpiece with respect to a plurality of laser spots including a first spot, a second spot, and a third spot which are linearly arranged so that the first spot, the second spot, and the third spot pass through a processing target portion of the workpiece in this order. To a total amount of energy of laser beam in the first spot, the second spot, and the third spot, a ratio of energy in the first spot is not less than 20% and not more than 30%, a ratio of energy in the second spot is not less than 20% and not more than 30%, and a ratio of energy in the third spot is not less than 45% and not more than 55%.
This wiping device is for removing liquid from the surfaces of a metallic band sheet that is being conveyed, and the device comprises a wiping part which is provided so as to be capable of coming into contact with the rolled surfaces of the band sheet. The wiping part is disposed in a manner as to be capable of coming into contact with the rolled surfaces, and includes a plurality of divisional members that extend along the extension direction of the wiping part. The divisional members are arrayed along the extension direction of the wiping part.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
25.
ROLLING MILL, ROLLING MILL CONTROL METHOD, AND THRUST FORCE SUPPORTING METHOD IN ROLLING MILL
Provided are: an upper work roll, radial bearings and a thrust bearing provided on a work side and a drive side of the upper work roll and supporting the upper work roll. Shift cylinders are provided on the work side of the upper work roll and apply forces in both a work side direction and a drive side direction to the thrust bearing. Shift cylinders are also provided on the drive side of the upper work roll and apply forces in both the work side direction and the drive side direction to the radial bearing 790B. The shift cylinders each apply a force in the same direction to the radial bearing and the thrust bearing when the upper work roll does not shift in an axial direction at least during rolling.
B21B 37/40 - Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
Angles of an upper-side pair of an upper work roll 110A and an upper backup roll 120A, and a lower-side pair of a lower work roll 110B and a lower backup roll 120B are adjusted in a state where the upper-side pair is kept parallel and in a state where the lower-side pair is kept parallel. Thereafter, work-roll pressing apparatuses 130A and 130B, work-roll position control apparatuses 140A and 140B, backup-roll pressing apparatuses 150A and 150B, and backup-roll position control apparatuses 160A and 160B are controlled such that the angles of the upper work roll 110A and the lower work roll 110B are adjusted in a state where the angles of the upper backup roll 120A and the lower backup roll 120B are maintained.
An apparatus for detecting an edge crack of a metal plate being conveyed includes: a detection part including a plurality of elements configured to detect a presence or absence of the metal plate at a position of the element in the plate width direction; a plate edge position determination part configured to determine a plate edge position of the metal plate in the plate width direction on the basis of a detection result of each of a plurality of first elements positioned within a first region in the plate width direction; and an edge crack detection part configured to detect an edge crack of the metal plate on the basis of a detection result of each of a plurality of second elements selected on the basis of the plate edge position and positioned within a second region which is narrower than the first region in the plate width direction.
G01N 23/18 - Investigating the presence of defects or foreign matter
G01N 23/16 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and measuring the absorption the material being a moving sheet or film
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
A hot rolling mill 1 includes a control apparatus 20 that adjusts an angle formed between an upper-side pair of an upper backup roll 120A and an upper work roll 110A and a lower-side pair of a lower backup roll 120B and a lower work roll 110B in a state where the upper-side pair is kept parallel and in a state where the lower-side pair is kept parallel. The hot rolling mill 1 is configured such that the work rolls 110A and 110B satisfy the condition that DW/Lb is equal to or smaller than 0.30 where DW is a diameter of the work rolls 110A and 110B, and Lb is the maximum strip width of a rolled material, and the hot rolling mill 1 performs rolling in a state where a bending force is applied to the work rolls.
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
29.
METAL FUME REDUCTION DEVICE FOR SNOUT, SNOUT DEVICE, AND PLATING EQUIPMENT
A metal fume reduction device for a snout to be disposed between the exit of a heat treatment furnace and a molten metal plating bath, the device comprising a main pipe section, an introduction pipe section and a return pipe section which are respectively configured to enable the snout to be connected to the main pipe section such that an internal space of the snout and the main pipe section communicate with each other, and a cooling section configured to cool an area to be cooled, which is positioned between a first connection part and a second connection part of the main pipe section to be respectively connected to the introduction pipe section and to the return pipe section in the longitudinal direction of the main pipe section, wherein when the main pipe section has been connected to the snout via the introduction pipe section and the return pipe section, the area to be cooled is positioned lower than the first connection part of the main pipe section.
In a work roll balance force setting method of a rolling mill, a kiss roll load Pk, a rolling load Pr, and rolling torque Tr of work rolls 610 and 611 in relation to a work roll angle θx of the tip position of a rolled material 5 between the start of biting of the rolled material 5 and completion of the biting are determined by using a mill longitudinal rigidity coefficient K and a rolling condition. Thereafter, the traction coefficient μrt between the work rolls 610 and 611 and intermediate rolls 620 and 621, and a maximum value μrtmax of μrt in relation to θx in a state in which hypothetical work roll balance force Pb is applied are determined from a sum P of Pk, Pr, and Pb, and Tr between the start of biting of the rolled material 5 and completion of the biting. Thereafter, a tolerated value μrtcr of μrt is compared with μrtmax, and work roll balance force at the start of biting of the rolled material 5 is reset to a value which is equal to or larger than a value that is required when μrt assumes the maximum value μrtmax, and equal to or smaller than a value that is a limit based on a constraint in terms of strength of the rolling mill, in a case where μrtcr is equal to or larger than μrtmax.
A control device 20 of a rolling machine 1 has: a first angle command section 20a that issues a command so as to adjust the angle between an upper pair and a lower pair, with the upper pair being in parallel and the lower pair being in parallel; a second angle command section 20b that issues a command that inclines work rolls 110A, 110B, with the angle of backup rolls 120A, 120B being maintained; and an axial position command section 20c that issues a command for shifting the work rolls 110A, 110B in the direction in which a thrust force acts, said force being the total thrust force that the work rolls 110A, 110B, which were inclined according to the command from the second angle command section 20b, receive from the backup rolls 120A, 120B and a rolled material S. On the basis of the commands by the first angle command section 20a, the second angle command section 20b, and the axial position command section 20c, the control device controls work-roll pressing devices 130, 130B, work-roll home-position control devices 140A,140B, and shift cylinders 115A,115B.
A control device for a rolling mill apparatus including at least one rolling mill stand for rolling a metal plate includes: a detection signal acquisition part for receiving, from an edge crack sensor, a detection signal of an edge crack at an end portion of the metal plate in a plate width direction; and a rolling condition decision part for deciding a rolling condition for the rolling mill apparatus. The rolling condition decision part is configured to change, if the detection signal acquisition part receives the detection signal of the edge crack, the rolling condition for the rolling mill apparatus from a first rolling condition immediately before detection of the edge crack to a second rolling condition which is more capable of suppressing growth of the edge crack than the first rolling condition.
B21B 27/10 - Lubricating, cooling, or heating rolls externally
B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
B21B 37/32 - Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
B21B 37/38 - Control of flatness or profile during rolling of strip, sheets or plates using roll bending
B21B 37/40 - Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
A rolling mill is provided with: a roll for rolling a metal plate, the roll being capable of shifting in an axial direction and having a tapered portion at an end portion in the axial direction; and a heating unit configured to form an expansion portion protruding in a radial direction in the tapered portion by heating the tapered portion.
B21B 37/32 - Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
B21B 27/10 - Lubricating, cooling, or heating rolls externally
B21B 31/18 - Adjusting rolls by moving rolls axially
B21B 37/16 - Control of thickness, width, diameter or other transverse dimensions
B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
34.
CONTROL DEVICE FOR CONTROLLING ROLLING DEVICE, ROLLING FACILITY, AND METHOD FOR CONTROLLING ROLLING DEVICE
A control device for controlling a rolling device that includes a pair of rolling rolls for rolling a metal strip, an unwinding machine for unwinding the metal strip toward the pair of rolling rolls, and a winding machine for winding the metal strip that has been rolled by the pair of rolling rolls, said control device comprising a rotation control unit for controlling the rotation of the rolling rolls, a speed acquisition unit configured so as to acquire the speed of the metal strip between the unwinding machine and the rolling rolls, and a separation detection unit configured so as to detect separation of the tail end of the metal strip from the unwinding machine, wherein the rotation control unit is configured so as to stop the rotation of the pair of rolling rolls on the basis of the separation timing, which is the timing at which separation of the tail end from the unwinding machine is detected by the separation detection unit, and the speed of the metal strip as acquired by the speed acquisition unit.
A leveling control device 150 comprises: a torque acquisition unit 161 that finds, from torque measured by each of shape meters 91, 92, 93, 94, 95, 96 which are provided among a plurality of rolling stands, a torque distribution applied in the width direction of a steel sheet 1, such torque distribution being that among each of the plurality of rolling stands; a primary component computation unit 162 that obtains a tension distribution in the width direction from the obtained torque distribution and that obtains a primary component for a case in which a tension distribution of the steel sheet 1 is expressed as a polynomial from the tension distribution; a leveling correction amount computation unit 163 that obtains, on the basis of the obtained primary component, a leveling correction amount of a rolling stand, of the plurality of rolling stands, immediately before a rolling upstream side; and a leveling amount change unit 164 that changes, on the basis of the obtained leveling correction amount, a leveling amount in order from the (final -1)st stand of the plurality of rolling stands toward the rolling upstream side.
This wiping device is for removing liquid from the surface of a metal strip being carried, and includes a wiping member having a flat surface provided so as to be able to contact the surface of the strip, wherein the wiping member is formed of a graphite fiber reinforced resin composite material.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
A wiping device for removing liquid from a surface of a metal strip plate being conveyed, the device comprising a first wiping member that is disposed in such a manner as to be capable of coming into contact with a rolling surface of the strip plate, wherein the first wiping member has an inclination portion that extends in a direction tilted with respect to the plate-width direction of the strip plate.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
38.
SIX-HIGH ROLLING MILL STAND AND FINISHING MILL TRAIN FOR HOT ROLLING AN INTERMEDIATE STRIP INTO A THIN STRIP
The invention concerns a six-high rolling (also known as sexto) mill stand (1) for hot rolling an intermediate strip (2) into a thin strip (3) and a method for producing a thin strip (3) in a combined casting and rolling installation (40), wherein the thickness of the thin strip (3) is < 0.8 mm. It is an object of the invention to come up with a six-high rolling mill stand (1) that is suitable for hot-rolling of ultra-thin steel strip (3) with a thickness < 0.8 mm in a combined casting and rolling installation (1), whereby the hot rolling can be done in long uninterrupted sequences, without any change of the work rolls (4a, 4b), and very good geometry of the strip due to moderate rolling forces. This object is solved by the six-high rolling mill stand (1) for hot rolling an intermediate strip (2) into a thin strip (3) according to claim 1.
B21B 1/46 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
B21B 29/00 - Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls
B21B 37/32 - Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
B21B 37/38 - Control of flatness or profile during rolling of strip, sheets or plates using roll bending
B21B 38/02 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
The present invention provides a pickling device for pickling a metal strip being transported, the pickling device comprising a pickling tank for storing an acid solution, an enclosing part provided in the pickling tank so as to surround the strip immersed in the acid solution in the pickling tank, and an oxidizing-agent-feeding unit for feeding a liquid oxidizing agent towards the interior of the enclosing part.
The present invention comprises: cameras 81, 82 that capture images of a material 1 being rolled, which is to be subjected to rolling abnormality detection, during the rolling of the material 1 being rolled; a brightness reference value setting unit 91 that extracts the material 1 being rolled from at least one image captured by the cameras 81, 82 and determines a brightness reference value with which it is determined that there is no abnormality in the material 1 being rolled from the brightness data of pixels within the area of the material 1 being rolled; and an image processing unit 92 that establishes one or more images among the one or more captured images as comparison images, extracts the material 1 being rolled from each of the comparison images, and detects a surface rolling abnormality on the basis of the brightness difference between the brightness data within the area of the material 1 to be rolled and the brightness reference value. Thus provided are an abnormality detection device and an abnormality detection method with which sheet rolling abnormality detection accuracy can be improved in comparison to conventional devices and methods.
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
41.
ABNORMALITY DETECTION DEVICE AND ABNORMALITY DETECTION METHOD
This abnormality detection device is for detecting a rolling abnormality in the surface of a material 1 to be rolled that is rolled by a rolling mill, and comprises: cameras 81 and 82 for photographing the material 1 to be rolled, for which an abnormality is to be detected; and an image processing device 92 for dividing luminance data of pixels that are from an image captured by the cameras 81 and 82 and are within the range of the material 1 to be rolled, into three components, that is, an R value, a G value, and a B value, and for detecting a rolling abnormality in the surface on the basis of the relationship between the luminance data of two components among the luminance data of the components. Thus, the present invention provides an abnormality detection device and an abnormality detection method with which the detection accuracy with regard to a rolling abnormality in a sheet can be improved in comparison to the prior art.
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
G01N 21/892 - Investigating the presence of flaws, defects or contamination in moving material, e.g. paper, textiles characterised by the flaw, defect or object feature examined
42.
METHOD FOR DETERMINING INITIAL POSITION OF EDGE MASK AND DEVICE FOR DETERMINING INITIAL POSITION OF EDGE MASK
This method, which is for determining an initial position of an edge mask for blocking a cooling material sprayed toward a steel sheet in a region that includes the sheet end position in the sheet width direction of the steel sheet, comprises: a first acquisition step for acquiring a first correlation between the position of the edge mask in the sheet width direction and a first temperature difference EU, which is a difference between the maximum temperature and the average temperature of the steel sheet in the sheet width direction, and a second correlation between the position of the edge mask and a second temperature difference ED, which is a temperature difference between the average temperature and the temperature at the sheet end position in the sheet width direction of the steel sheet or a position which is on the inside from the sheet end position by a prescribed amount and which is on the outside of the position where the temperature is the maximum; a second acquisition step for acquiring, on the basis of the first correlation and the second correlation, a first position, which is the position of the edge mask for which the absolute value |EU-ED| of the difference between the first temperature difference EU and the second temperature difference ED is within a prescribed range; and a determination step for using the first position to determine the initial position of the edge mask.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
43.
ABNORMALITY DETERMINATION DEVICE, CONTROL DEVICE, ROLLING EQUIPMENT, ABNORMALITY DETERMINATION METHOD, AND CONTROL METHOD
0000 is the sheet width of a rolled stationary section of the rolled material 1, and W is the sheet width of the rolled material 1 at a section sequentially captured by the camera 81. Due to this configuration, the following are provided: an abnormality determination device which can uniformly determine an abnormality in the sheet width of a metal strip of any width; a control device for a rolling mill; rolling equipment; an abnormality determination method; and a control method.
G01B 11/04 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness specially adapted for measuring length or width of objects while moving
44.
Method for pickling steel plate and pickling apparatus
This rolling equipment is equipped with: a support part extending in the sheet width direction of a steel sheet to be rolled; a thickness measurement part supported by the support part and configured so as to measure the thickness of the steel sheet; and a heating part supported by the support part at locations on both sides which sandwich the thickness measurement part therebetween in the sheet width direction, and configured so as to heat both end sections of the steel sheet.
B21B 45/00 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
46.
GEAR SPINDLE DEVICE FOR ROLLING MILL, ROLLING FACILITY, AND METHOD FOR COOLING GEAR SPINDLE DEVICE FOR ROLLING MILL
This gear spindle device for a rolling mill comprises: a spindle outer cylinder having, at one end side thereof, an internal peripheral surface provided with internal peripheral teeth; a spindle inner cylinder having an outer peripheral surface provided with outer peripheral teeth that mesh with the inner peripheral teeth; a seal member for retaining a lubricating oil in a meshing part between the inner peripheral teeth and the outer peripheral teeth, the seal member being provided between the spindle outer cylinder and the spindle inner cylinder; and a coolant supply unit for supplying a coolant toward the spindle outer cylinder in a range in which the meshing part is formed, the coolant supply unit being provided on the opposite side from the seal member with the meshing part therebetween in the axial direction of the spindle outer cylinder.
B21B 35/12 - Toothed-wheel gearings specially adapted for metal-rolling mills; Housings or mountings therefor
F16D 3/18 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts the coupling parts having slidably-interengaging teeth
An acid solution preparation device is an acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device including a sealed tank for storing the acid solution, a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank, and a purge part for discharging a gas in the sealed tank to the outside.
There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.
B21B 1/02 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, billets, in which the cross-sectional form is unimportant
B21B 13/02 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
B21B 31/20 - Adjusting rolls by moving rolls perpendicularly to roll axis
B21B 31/32 - Adjusting rolls by moving rolls perpendicularly to roll axis by liquid pressure
B21B 37/28 - Control of flatness or profile during rolling of strip, sheets or plates
B21B 37/62 - Roll-force control; Roll-gap control by control of a hydraulic adjusting device
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B21B 38/10 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
A laser processing method is provided with a step for relatively moving a material to be processed to a plurality of laser spots including a first spot, a second spot, and a third spot in such a manner that the first spot, the second spot, and the third spot linearly arranged are passed through a processing subject portion of the material to be processed in this order, thereby processing the material to be processed. To a total amount of energy of laser light in the first spot, the second spot, and the third spot, a ratio of energy in the first spot is 20% to 30% (both inclusive), a ratio of energy in the second spot is 20% to 30% (both inclusive), and a ratio of energy in the third spot is 45% to 55% (both inclusive).
A spindle for transmitting rotational driving force to a rolling roll comprises: a female coupling part having on one end side an engaging recess that can receive an engaging protrusion of a male coupling part; and a rotary joint that is provided on the other end side of the female coupling part, and that includes an annular rotating part configured to rotate together with the female coupling part and an annular stationary part positioned on the outer peripheral side of the annular rotating part. The female coupling part includes on said one end side a pair of projecting parts having facing surfaces defining the engaging recess, the female coupling part has a plurality of oil supply channels for supplying oil to the engaging recess, and the rotary joint has a plurality of annular oil channels that each communicate with any of the plurality of oil supply channels. The plurality of oil supply channels includes at least one oil supply channel corresponding to each of four areas resulting from the engaging recess being divided by a center line between the pair of facing surfaces and a straight line orthogonal to the center line in a cross section orthogonal to the axial direction of the spindle. Said at least one oil supply channel provided corresponding to one of the four areas communicates with an annular oil channel that, among the plurality of annular oil channels, is not the annular oil channel that communicates with said at least one oil supply channel corresponding to an area adjacent to said one area of the four areas.
This edge crack detection apparatus is for detecting edge cracks in a metal plate being conveyed, the edge crack detection apparatus being provided with a detection unit that includes a plurality of elements arrayed along the plate width direction of the metal plate. The plurality of elements are each configured to be able to detect the presence or absence of the metal plate at the position of the element in the plate width direction. The apparatus is also provided with: a plate end position identification unit that is configured to identify a plate end position of the metal plate in the plate width direction on the basis of the results of the detection by a plurality of first elements, among the plurality of elements, positioned in a first region in the plate width direction; and an edge crack detection unit that is configured to detect an edge crack in the metal plate on the basis of the results of the detection by a plurality of second elements which are selected from among the plurality of elements on the basis of the plate end position and which are positioned in a second region which is narrower than the first region in the plate width direction.
G01N 23/16 - Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups , or by transmitting the radiation through the material and measuring the absorption the material being a moving sheet or film
G01N 23/18 - Investigating the presence of defects or foreign matter
52.
CONTROL DEVICE FOR ROLLING DEVICE, ROLLING EQUIPMENT, AND METHOD FOR OPERATING ROLLING DEVICE
A control device for a rolling device that comprises at least one rolling stand for rolling a metal sheet, said control device for a rolling device comprising: a detection signal acquisition unit that is for receiving, from an edge crack sensor, a detection signal regarding an edge crack in a sheet width direction end section of the metal sheet; and a rolling condition determination unit that is for determining a rolling condition of the rolling device, wherein the rolling condition determination unit is configured such that when the detection signal acquisition unit has received the detection signal regarding an edge crack, the rolling condition determination unit changes a rolling condition of the rolling device from a first rolling condition, which is from immediately before the edge crack was detected, to a second rolling condition, with which spreading of the edge crack can be better suppressed than with the first rolling condition.
The present invention comprises: an upper work roll 710; radial bearings 790A, 790B, a thrust bearing 792 that are provided on a work side and a drive side of the upper work roll 710 and support the upper work roll 710; shift cylinders 715A, 715B that are provided on the work side of the upper work roll 710 and apply force to the thrust bearing 792 in both the direction of the work side and the direction of the drive side; and shift cylinders 715C, 715D that are provided on the drive side of the upper work roll 710 and apply force to radial bearing 790B in both the direction of the work side and the direction of the drive side. The shift cylinders 715A, 715B, 715C, 715D apply force to the thrust bearing 792, radial bearing 790B in the same direction at least when the upper work roll 710 does not shift in the axial direction during rolling.
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
In a state in which a top-side pair constituted from an upper work roll 110A and an upper backup roll 120A are parallel, and a state in which a bottom-side pair constituted from a lower work roll 110B and a lower backup roll 120B are parallel, angle adjustment of the top-side pair and the bottom-side pair is performed, and then, with the angle of the upper backup roll 120A and the lower backup roll 120B maintained, work roll pressing devices 130A, 130B and work roll fixed-position control devices 140A, 140B, and backup roll pressing devices 150A, 150B and backup roll fixed-position control devices 160A, 160B are controlled so that angle adjustment of the upper work roll 110A and the lower work roll 110B is performed.
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
According to the present invention, a control device 20 derives second pressing forces acting on respective roll chocks 112A, 112B of the work side and the drive side on the basis of first pressing forces on the input side and the output side, and controls work roll fixed position control devices 140B, 141B or work roll pressing devices 130B, 131B, which change the position of the roll chocks 112A, 112B of at least one among the work roll fixed position control devices 140B, 141B or the work roll pressing devices 130B, 131B, so that the difference between the work-side second pressing force and the drive-side second pressing force is no more than a predetermined value.
A rolling mill comprises: bending cylinders 740, 741, 744 for applying a bending force in the vertical direction to bearing boxes 712, 713 to bend work rolls 710, 711; a backlash removal cylinder 760 for applying a pressing force in the rolling direction to the bearing boxes 712, 713; and members 712A, 713A for receiving the bending force from the bending cylinder 744, the members 712A, 713A being positioned between the bending cylinder 744 and the bearing boxes 712, 713, the bending cylinders 740, 744 and the backlash removal cylinder 760 being provided in the axial direction on either the entry side or the exit side in the rolling direction, and the bending cylinder 741 and the members 712A, 713A being provided on the other of either the entry side or the exit side in the rolling direction.
This cooling device for sintered ore comprises: a deposition tank having an internal space for receiving sintered ore, and a lower opening through which the sintered ore can be discharged; a rotary table which is disposed below the deposition tank at an interval from the lower opening, and configured to rotate together with the deposition tank; a scraper provided between the deposition tank and the rotary table; an exhaust hood provided above the deposition tank so as to communicate with the internal space of the deposition tank; and a nozzle which is provided at a position below the lower opening and above the rotary table, and configured to discharge a cooling fluid.
A monitoring device for monitoring a plurality of apparatuses positioned in an area to be monitored, the monitoring device comprising: a sound collection unit for collecting sound in the area to be monitored; an acoustic map generation unit for generating, on the basis of the sound collected by the sound collection unit, an acoustic map indicating the relationship between the positions of a plurality of sound sources included in the area to be monitored and the acoustic pressure of each of the sound sources; an abnormality diagnosis unit configured so as to diagnose an abnormality in at least one apparatus being monitored among the plurality of apparatuses; and a data generation unit for accepting the acoustic map generated by the acoustic map generation unit and the diagnosis result for the apparatus being monitored as produced by the abnormality diagnosis unit, and generating monitoring image data in which the diagnosis result is superposed on the acoustic map in association with the position of the apparatus being monitored on the acoustic map.
A rolling machine comprising: a roll for rolling a metal sheet, the roll being capable of shifting in the axial direction, and having a tapered section at the axial-direction end part thereof; and a heating unit that heats the tapered section, the heating unit being configured so as to form an expansion part that protrudes radially toward the tapered section.
B21B 13/14 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load
B21B 31/18 - Adjusting rolls by moving rolls axially
A method for pickling a steel plate, which is a method for pickling a steel plate including a first steel plate section and a second steel plate section which is connected to a tail end of the first steel plate section and has such a property that, when the steel plate sections are pickled under the same condition, the time required for the pickling of the second steel plate section is longer than the time required for the pickling of the first steel plate section, the method comprising: a step of immersing the steel plate in an acid solution in one or more pickling vessels while conveying the steel plate to pickle the steel plate; a step of circulating the acid solution between an oxidation device arranged on a circulation line connected to any one of the one or more pickling vessels and the pickling vessel through the circulation line; a step of oxidating Fe2+into Fe3+in the acid solution using a gas oxidating agent in the oxidation device; and a charging start step of starting the charging of a liquid oxidating agent for oxidating Fe2+into Fe3+ in the acid solution into any one of the one or more pickling vessels or the circulation line in association with the switching from the pickling of the first steel plate section to the pickling of the second steel plate section.
A premix burner for combusting premixed gas containing fuel and air mixed in advance includes a plurality of combustion nozzles including a first nozzle having an ignition rod disposed therein and a second nozzle other than the first nozzle, a first premixed gas passage for supplying the premixed gas to the first nozzle, and a second premixed gas passage for supplying the premixed gas to the second nozzle. The first premixed gas passage and the second premixed gas passage are fluidically isolated from each other.
A rolling mill provided with: a roll which shifts in an axial direction; a bearing which shifts together with the roll in the axial direction of the roll, and which bears load from the roll; and three or more first cylinders for bending the roll by applying a bending force to the bearing in a vertical direction. The bearing and the first cylinders are provided on both a drive side and an operating side of the roll. Two of the first cylinders are provided in the axial direction of the roll on the entry side or exit side of a roll material 5. One of the first cylinders is provided on one of the exit side or entry side of the roll material 5 opposite to the side on which the two first cylinders are provided. When viewed from a rolling direction, the first cylinder on the opposite side is positioned between the two first cylinders.
B21B 31/18 - Adjusting rolls by moving rolls axially
B21B 29/00 - Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls
B21B 37/42 - Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls
64.
Laser processing head, laser processing device, and method for adjusting laser processing head
A laser processing head includes a laser irradiation part, a collimating optical system for collimating laser light from the laser irradiation part, and a collecting optical system for collecting the laser light after passing through the collimating optical system. An optical system including the collimating optical system and the collecting optical system is configured such that the laser light after passing through the collecting optical system has coma aberration. The laser processing head further includes a first moving part for moving at least one of the laser irradiation part or the collimating optical system so as to change a relative position of the collimating optical system with respect to the laser irradiation part, in a first direction orthogonal to a center axis of the laser irradiation part or the collimating optical system, and a second moving part for moving the collecting optical system so as to change a relative position of the collecting optical system with respect to the collimating optical system, in a second direction orthogonal to a center axis of the collecting optical system.
This method for assisting operation of a rolling facility comprises a target rotational speed acquisition step for acquiring the rotational speed fr of a rolling roll, and a step for outputting the acquired rotational speed fr as a target rotational speed. In the target rotational speed acquisition step, the correlation between the rotational speed fr and a characteristic value σ, which indicates an N-gon-forming tendency for the rolling roll to form into an N-gon by being subjected to uneven wear when rolling is performed at the rotational speed fr, is used as a basis upon which to acquire the rotational speed fr that corresponds to a characteristic value σ indicating that the rolling roll is forming into an N-gon in a slowed or attenuated manner.
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
66.
STATE EVALUATION METHOD AND STATE EVALUATION DEVICE OF ROLLING DEVICE, AND ROLLING EQUIPMENT
This state evaluation method of a rolling device is a method for evaluating the growth tendency of N-polygonization in which the rolling rolls of the rolling device are unevenly worn into an N-polygon, the method comprising: a vibration data acquisition step for, during rolling at a rotation speed fr of the rolling roll, acquiring vibration data indicating the vibration of the rolling roll in each of a plurality of sampling periods; an amplitude acquisition step for performing frequency analysis on each of the vibration data acquired during the plurality of sampling periods and acquiring the amplitude of the vibration at the frequency corresponding to the N-polygon; and an evaluation step for evaluating the growth tendency of the N-polygonization of the rolling roll during rolling at the rotation speed fr, on the basis of the temporal change of the amplitude acquired for each of the vibration data.
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
An operation support apparatus for a heat-treatment furnace for heat-treating a metal plate continuously includes a required time calculation unit configured to calculate, based on a current furnace temperature which is a current temperature of the heat-treatment furnace, a current line speed which is a current conveyance speed of the metal plate, and a target line speed which is a conveyance speed of the metal plate to be changed from the current line speed, an estimated required time until a temperature of the heat-treatment furnace reaches, from the current furnace temperature, a target furnace temperature which is a temperature of the heat-treatment furnace corresponding to the target line speed, and a first output unit configured to output the estimated required time calculated by the required time calculation unit.
F27B 9/40 - Arrangements of controlling or monitoring devices
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
C21D 11/00 - Process control or regulation for heat treatments
F27D 21/00 - Arrangement of monitoring devices; Arrangements of safety devices
G05B 19/18 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
68.
METHOD OF OPERATING ROLLING DEVICE, CONTROL DEVICE FOR ROLLING DEVICE, AND ROLLING EQUIPMENT
This method of operating a rolling device including a pair of rolling rolls provided to sandwich a metal plate comprises: a detection step for detecting a plate end position of the metal plate in a plate width direction at an output-side position of the pair of rolling rolls while rolling the metal plate by the pair of rolling rolls in a state in which an output-side tensile force applied to the metal plate is zero; a first leveling step for draft-leveling-controlling the pair of rolling rolls such that an outflow direction of the metal plate from the rolling rolls is along a transport direction of the metal plate in the rolling device when the detection result of the width end position of the metal plate in the detection step deviates from a reference position to one side in the plate width direction; and a second leveling step for, after the first leveling step, draft-leveling-controlling the pair of rolling rolls such that the outflow direction of the metal plate returns to the transport direction after the outflow direction of the metal plate from the rolling rolls is shifted to the outer side in the plate width direction with respect to the transport direction.
This method of operating a rolling device including a pair of rolling rolls provided to sandwich a metal plate comprises: a detection step for detecting a plate end position of the metal plate in a plate width direction at an output-side position of the pair of rolling rolls while rolling the metal plate by means of the pair of rolling rolls in a state in which an output-side tensile force applied to the metal plate is zero; a first leveling step for draft-leveling-controlling the pair of rolling rolls such that an outflow direction of the metal plate from the rolling rolls is along a transport direction of the metal plate in the rolling device when the detection result of the width end position of the metal plate in the detection step deviates from a reference position to one side in the plate width direction; and a second leveling step for, after the first leveling step, draft-leveling-controlling the pair of rolling rolls such that the outflow direction of the metal plate returns to the transport direction after the outflow direction of the metal plate from the rolling rolls is shifted to the outer side in the plate width direction with respect to the transport direction.
A control device for controlling a rolling device including a pair of rolls provided to sandwich a metal plate therebetween is provided with: a first plate end detection unit provided on the entry side of the pair of rolls in the conveying direction of the metal plate, the first plate end detection unit being configured to detect a plate end position on the metal plate in the plate width direction at a first position in the conveying direction; a second plate end detection unit provided on the exit side of the pair of rolls in the conveying direction, the second plate end detection unit being configured to detect a plate end position on the metal plate in the plate width direction at a second position in the conveying direction; and a determination unit configured to determine whether to start end-tensionless rolling on the basis of the first plate end position on the metal plate detected by the first plate end detection unit and the second plate end position on the metal plate detected by the second plate end detection unit, the end-tensionless rolling being rolling of the metal plate with the pair of rolls in a state where the exit-side tension on the metal plate is zero.
A pickling facility includes: a pickling tank for storing an acid solution; a conveyance part for continuously conveying a steel plate immersed in the acid solution; a measurement part for measuring at least one parameter which has a correlation with a heat transfer coefficient between the acid solution and a reference surface disposed in the acid solution so as to face the steel plate; and a conveyance speed decision part configured to decide a conveyance speed of the steel plate conveyed by the conveyance part, on the basis of a measurement result of the at least one parameter.
A monitoring device for heat treatment equipment comprising at least one displacement detector that is provided outside the furnace body of the heat treatment equipment and that is configured so as to detect horizontal displacement of one of a pair of furnace walls constituting the furnace body.
G01B 21/00 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
73.
COATING FILM REMOVAL DEVICE, COATING FILM REMOVAL METHOD, JOINING DEVICE, AND JOINING METHOD
A coating film removal device (60) according to the present invention is provided with: pairs of brush rolls (61A, 61B) each for removing surface coating films formed on the obverse and reverse of a corresponding one of steel sheets S which are joining targets; and pairs of pressure application rolls (62A, 62B) each for holding the steel sheet S having the surface coating films removed by a corresponding one of the pairs of brush rolls (61A, 61B) from the obverse and reverse and for applying pressure to the joining target while moving with respect to the joining target. The coating film removal device (60) according to the present invention, when removing the surface coating films, applies pressure to each of the steel sheets S from the obverse and reverse by using a corresponding one of the pairs of pressure application rolls (62A, 62B). Therefore, even if each of the steel sheets S undergoes deformation such as undulation, deformation is reduced in a pressure application portion during pressure application.
B24B 29/06 - Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction
B23K 11/06 - Resistance welding; Severing by resistance heating using roller electrodes
A coating film removal device (60) according to the present invention is provided with: pairs of brush rolls (61A, 61B) each for being implemented by rotary bodies supported by main shafts (63A, 63B) and each for removing surface coating films formed on the obverse and reverse of a corresponding one of steel sheets (S) which are joining targets; and pairs of pressing rolls (62A, 62B) each for holding the steel sheet (S) having the surface coating films removed by a corresponding one of the pairs of brush rolls (61A, 61B) from the obverse and reverse and for applying pressure to the joining target while moving with respect to the joining target. External ends (E1, E2), for each of the pairs of brush rolls (61A, 61B) and each of the pairs of pressing rolls (62A, 62B), which come into contact with a corresponding one of the steel sheets (S) are disposed in an array in the direction of the main shafts (63A, 63B). The coating film removal device (60) according to the present invention, when removing the surface coating films by using a corresponding one of the pairs of pressure application rolls (61A, 61B), applies pressure to each of the steel sheets S from the obverse and reverse by using a corresponding one of the pairs of pressing rolls (62A, 62B). Therefore, even if each of the steel sheets (S) undergoes deformation such as undulation, deformation is reduced in a pressure application portion during pressure application.
B24B 29/06 - Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction
This cooling device for particulate matter is provided with: an annular hopper that is provided around a center axis and that has an inner circumferential wall and an outer circumferential wall that define a receiving space for receiving the supply of the particulate matter; an annular table provided around the center axis below the receiving space; a cooling unit for supplying a cooling fluid to the receiving space of the annular hopper; and a scraper provided between the annular hopper and the annular table. The scraper includes: a first portion that is positioned further radially inward than a middle position between the inner circumferential wall and the outer circumferential wall; and a second portion that is positioned within a range of the scraper facing the annular table, and further radially outward than the middle position between the inner circumferential wall and the outer circumferential wall. The lower surface of the second portion of the scraper is positioned higher than the lower surface of the first portion.
F28C 3/16 - Other direct-contact heat-exchange apparatus one heat-exchange medium at least being a fluent solid, e.g. a particulate material the heat-exchange medium being a particulate material and a gas, vapour, or liquid the particulate material forming a bed, e.g. fluidised, on vibratory sieves
This preparation device is for an acidic liquid used for pickling a steel sheet and is provided with a sealed tank for storing the acidic liquid, a gas feeding part for feeding an oxygen-containing gas to the sealed tank from the outside of the sealed tank, and a purging part for discharging gas inside the sealed tank to the outside thereof.
This diagnostic device for diagnosing a piece of machinery that includes a driving part and a driven part rotationally driven by the driving part comprises: a plurality of acoustic sensors that are provided to different locations and that are for detecting sounds generated by the machinery; a sound data acquisition unit that is configured so as to acquire a plurality of sound data sets including the sounds detected by each of the plurality of acoustic sensors during each of a plurality of rotational speed conditions differing in the rotational speed of the driving part; a frequency analysis unit that is configured so as to analyze the frequencies of the plurality of sound data sets respectively acquired for the plurality of rotational speed conditions; a peak frequency identification unit that identifies, on the basis of the frequency analysis results from the frequency analysis unit, one or more rotational speed conditions in which the plurality of sound data sets share a peak frequency, and said peak frequency; and a sound source information acquisition unit that, for each of the one or more rotational speed conditions, obtains information related to a sound generation source, within the machinery, having a natural frequency corresponding to the peak frequency, the information being obtained on the basis of the installed location, relative to the machinery, of the one acoustic sensor having the largest amplitude in the sound data corresponding to the peak frequency, among the plurality of acoustic sensors.
G01H 17/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
78.
CONTROL DEVICE FOR ROLLING DEVICE, ROLLING EQUIPMENT, AND METHOD FOR OPERATING ROLLING DEVICE
This control device for a rolling device is a control device for controlling a rolling device which includes a pair of rolling rolls provided in such a way as to sandwich a metal plate, and an unwinding device for unwinding the metal plate on an entry side of the rolling rolls in the direction of travel of the metal plate, and which is configured to roll the metal plate by means of the pair of rolling rolls, wherein the control device is configured such that, after a tip end portion of the metal plate has passed between the pair of rolling rolls in a state in which a gap between the pair of rolling rolls is greater than the plate thickness of the metal plate, the metal plate is reduced by means of the pair of rolling rolls in a state in which an exit side tension applied to the metal plate is zero, an entry side tension applied to the metal plate by the unwinding device is set to be greater than zero, and the pair of rolling rolls are caused to start rotating.
B21C 47/00 - Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
B21B 1/32 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a non-continuous process in reversing mills, e.g. with intermediate storage reels for accumulating work
WDD, that calculates the strip wedge after the rolling based on the distribution in the strip width direction of the strip load obtained and the position in the strip width direction of the rolled material 5 set by a rolled material position setting device, that computes a working roll gap difference between the work side and the drive side of a vertical pair of an upper working roll 21 and a lower working roll 31 for making the strip wedge after the rolling calculated a predetermined value, and that controls the drive side hydraulic cylinder 11D and the work side hydraulic cylinder 11W such that the working roll gap difference computed is attained.
Changing rolls in rolling equipment is performed more efficiently. For this purpose, a roll changing device (12) for changing a pair of top and bottom work rolls (21) provided in a rolling mill (11) for rolling a strip to be passed therethrough includes: a work roll holding unit (51) holding the pair of top and bottom work rolls (21) in an attachable/detachable manner and capable of moving the work rolls (21) in a threading direction; a roll holding device (31) including the work roll holding unit (51) and capable of moving in a roll axis direction relative to the rolling mill (11) in a state of holding the work rolls (21) by using the work roll holding unit (51); and a work roll transfer device (32) capable of moving in a direction intersecting with a moving path of the roll holding device (31) and capable of mounting the work rolls (21).
A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is ΔXn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is ΔXn. The staggered array of the first nozzles and the staggered array of the second nozzles are disposed offset from each other such that, a center of the second nozzle is at a position offset by a shift amount S from a center of the first nozzle in the width direction, and the center of the second nozzle is positioned in a region defined by an oval having a semi-axis of ΔXn/4 in the width direction and a semi-axis of Yn/3 in the longitudinal direction. The shift amount S is expressed by S=m×ΔXn/2, where m is an odd number such that S is closest to Xn/2.
B21D 1/00 - Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
B65H 23/34 - Apparatus for taking-out curl from webs
83.
Plating adhesion amount control mechanism and method for controlling an adhesion amount by comparing a plating adhesion amount estimation value at an upstream position and a plating adhesion actual amount at a downstream position
When a portion for measuring the plating adhesion amount reaches an upstream side position, plating adhesion amount estimation values are calculated by using a plating adhesion amount estimation expression at positions away from a position that faces the distance sensors, that is, the upstream side position, by strip-width direction distances, of the surfaces of the steel strip. When the portion for measuring the plating adhesion amount reaches a downstream side position, the strip-width direction distances of the plating adhesion amount meters are matched to the strip-width direction distances, and the plating adhesion amount actual measurement values are obtained. The plating adhesion amount estimation expression is corrected on the basis of the differences between the plating adhesion amount estimation values and the plating adhesion amount actual measurement values. Accordingly, the control accuracy of the plating adhesion amount is improved.
C23C 2/00 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
C23C 2/06 - Zinc or cadmium or alloys based thereon
B05C 11/10 - Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
B05C 11/06 - Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface; Control of the thickness of a coating with a blast of gas or vapour
B05D 1/18 - Processes for applying liquids or other fluent materials performed by dipping
B05D 3/00 - Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
G05D 5/03 - Control of dimensions of material of thickness, e.g. of rolled material characterised by the use of electric means
B05B 12/08 - Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material discharged, of ambient medium or of target
B05C 3/12 - Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
B05D 3/04 - Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
84.
ROLLING EQUIPMENT DIAGNOSIS DEVICE AND DIAGNOSIS METHOD
A rolling equipment diagnosis device including a motor, a rolling roll driven by the motor, and a motive power transmission unit for transmitting motive power of the motor to the rolling roll, wherein the rolling equipment diagnosis device is provided with an acoustic sensor for sensing a sound generated from the rolling equipment, an excitation unit for exciting the motor, and a first frequency analysis unit for performing frequency analysis of first sound data sensed by the acoustic sensor in a state in which the motor is excited by the excitation unit and acquiring a first frequency spectrum indicating a correlation between the frequency and amplitude of the first sound data, the excitation unit being configured so that the excitation frequency at which the motor is excited can be changed.
B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
B21B 33/00 - Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
85.
PICKLING FACILITY AND METHOD FOR OPERATING PICKLING FACILITY
A pickling facility according to the present invention is provided with a pickling tank for storing an acid liquid; a conveyance unit for continuously conveying a steel plate immersed in the acid liquid, a measuring unit for measuring at least one parameter having a correlation with the coefficient of heat transfer between the acid liquid and a reference surface provided facing the steel plate in the acid liquid, and a conveyance speed determination unit configured so as to determining the speed of conveyance of the steel plate by the conveyance unit on the basis of the result of measuring the at least one parameter.
This laser machining head is provided with: a laser irradiation part; a collimation optical system for collimating laser beams from the laser irradiation part; a condensing optical system for condensing laser beams having passed through the collimation optical system. An optical system including the collimation optical system and the condensing optical system is configured to be able to generate coma aberration in the laser beams having passed through the condensing optical system. The optical system is further provided with: a first movement part for moving the laser irradiation part and/or the collimation optical system so as to change the relative position of the collimation optical system with respect to the laser irradiation part in the first direction orthogonal to the central axis of the laser irradiation part or the collimation optical system; and a second movement part for moving the condensing optical system so as to change the relative position of the condensing optical system with respect to the collimation optical system in the second direction orthogonal to the central axis of the condensing optical system.
This device for assisting the operation of a heat-treating furnace for continuously heat-treating a metal sheet is provided with: a required time calculation unit which is configured to, on the basis of a current furnace temperature being the current temperature of the heat-treating furnace, a current line speed being the current transportation speed of the metal sheet, and a target line speed being a transportation speed of the metal sheet to be set from the current line speed, calculate a predicted time required to bring the current furnace temperature to a target furnace temperature being the temperature of the heat-treating furnace corresponding to the target line speed; and a first output unit which is configured to output the predicted required time calculated by the required time calculation unit.
An ironing plate is attached to a friction stir welding apparatus in such a manner that the ironing plate surrounds an outer peripheral portion of a rotating tool and does not rotate together with the rotating tool, an inside diameter of a portion of the ironing plate into which the rotating tool is inserted is larger than the diameter of the rotating tool, and a material inflow path through which an excessive material of two metallic plates flows in is formed between the ironing plate and the rotating tool when the ironing plate is disposed to surround the outer peripheral portion of the rotating tool.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
A plate warp correction device for metal plates, the device being used in continuous plating processing equipment for metal plates and being characterized by comprising a sink roll that is disposed in a molten metal pot for plating, further on the downstream side in the conveyance direction of the metal plates than a fixing roll that changes the conveyance direction of the metal plates, and a correction roll that is disposed between the fixing roll and the sink roll and is for correcting warp in the metal plates, wherein the ratio D3/D1 of the diameter D3 of the sink roll to the diameter D1 of the fixing roll is at least 1.5.
C23C 2/06 - Zinc or cadmium or alloys based thereon
B21D 1/02 - Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
DEVICE FOR MEASURING SHAPE OF METAL PLATE, PLATE WARPAGE CORRECTION DEVICE, CONTINUOUS PLATING EQUIPMENT, AND PLATE WARPAGE CORRECTION METHOD FOR METAL PLATE
A device for measuring the shape of a metal plate is provided with a plurality of distance sensors including one or more first sensors disposed on one side of the path line of the metal plate in the direction of plate thickness of the metal plate and a plurality of second sensors disposed on the other side. The one or more first sensors are provided in a position between a pair of second sensors adjacent in the direction plate width.
B21D 1/02 - Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
A cooling device for metal plates, comprising a pair of jetting units provided along the plate width direction, on both sides in the plate thickness direction of the metal plates and interposing the metal plate path line therebetween, said jetting units being for jetting cooling gas towards the metal plates. Each of the jetting units includes: a first nozzle hole row including a plurality of first nozzle holes arranged along the plate width direction of the metal plates; and a second nozzle hole row provided at a position displaced from the first nozzle hole row in conveyance direction of the metal plate and including a plurality of second nozzle holes arranged along the plate width direction of the metal plates. Each of the jetting units has a groove between the first nozzle hole row and the second nozzle hole row, extending along the plate width direction and opening towards the metal plates.
A cooling device for metal plates, comprising a plurality of first nozzles and second nozzles that are provided on both sides in the plate thickness direction of the metal plates, respectively, interposing the metal plate path line therebetween. Each of the plurality of first nozzles and second nozzles forms a staggered arrangement having a pitch of Xn in the plate width direction of the metal plates, a pitch of Yn in the longitudinal direction of the metal plates, and a displacement ΔXn in the plate width direction of a pair of first or second nozzles that are adjacent in the longitudinal direction. The staggered arrangement of the first nozzles and the staggered arrangement of the second nozzles are mutually displaced such that: the half axis in the plate width direction is ΔXn/4, using as the center therefof a position displaced by a shift amount S from the center of the first nozzles in the plate width direction; and the center of the second nozzles is within a region prescribed by an ellipse having a half axis in the longitudinal direction of Yn/3. The shift amount S is indicated by S = m × ΔXn/2, m being an odd number whereby S is closest to Xn/2.
A welding apparatus including: a welding unit (20) that includes a pair of electrode wheels (21A, 21B) arranged to face each other with a welding object therebetween; a pressing unit (30) that includes a pair of press rolls (31A, 31B) that are arranged to face each other with the welding object therebetween and press a welded portion of the welding object welded by the electrode wheels (21A, 21B); a cooling unit (40) that supplies a cooling medium toward the welded portion pressed by the press rolls; a heating unit (50) that heats the welded portion cooled by the cooling unit (40); and a moving body (10) that supports the welding unit (20), the pressing unit (30), the cooling unit (40), and the heating unit (50), and reciprocates in a welding direction of the welding object.
A welding device is characterized by being provided with: a welding unit (20) comprising a pair of electrode wheels (21A, 21B) disposed facing each other across workpieces to be welded; a mash-down unit (30) comprising a pair of pressing rollers (31A, 31B) disposed facing each other across the workpieces and used for mashing down the welded portion of the workpieces welded by the electrode wheels (21A, 21B); a cooling unit (40) for providing a cooling medium to the welded portion mashed down by the pressing rollers; a heating unit (50) for heating the welded portion cooled by the cooling unit (40); and a moving body (10) which supports the welding unit (20), the reducing unit (30), the cooling unit (40), and the heating unit (50) and moves reciprocally in the direction in which the workpieces are welded.
A premix burner for burning a premixed gas, in which a fuel and air are mixed in advance, comprises a plurality of combustion nozzles that includes a first nozzle provided with an ignition rod therein, and a second nozzle in addition to the first nozzle, a first premixed gas passage for supplying a premixed gas to the first nozzle, and a second premixed gas passage for supplying the premixed gas to the second nozzle, and the premix burner is characterized in that the first premixed gas passage and the second premixed gas passage are separated fluidically.
In a soot blower, a heat transfer tube of a heat exchanger is arranged inside a pressure vessel, and gas for cleaning is injected toward the heat transfer tube from an injection pipe movable into and out of the pressure vessel. The soot blower includes a cylindrical casing provided to surround an insertion hole on the pressure vessel side into which the injection pipe is inserted, to extend outside the pressure vessel, the injection pipe being inserted into an inside of the casing; a support part provided inside the casing to guide movement of the injection pipe and to ensure airtightness between the casing and the injection pipe; and a gas supplying device provided immediately close to the support part to generate a jet stream of gas in a portion of the injection pipe that projects to the pressure vessel side.
There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.
Roll replacement in rolling equipment is performed more efficiently. Provided is a roll replacement device (12) that replaces a pair of upper and lower work rolls (21) provided in a rolling mill (11) that rolls a steel plate passing therethrough. The roll replacement device (12) includes: a work-roll holding unit (51) that holds the pair of upper and lower work rolls (21) in a detachable/attachable manner and that can move the held work rolls (21) in a plate passing direction; a roll holding device (31) that has the work-roll holding unit (51) and that can move in a roll-shaft direction with respect to the rolling mill (11) in a state in which the work rolls (21) are held by the work-roll holding unit (51); and work-roll transfer devices (32) that can move in a direction intersecting a moving path of the roll holding device (31) and on which the work rolls (21) can be placed.
To prevent over-pickling of a steel strip during pickling pause, and shorten the time required to switch between pickling operation and pickling pause, a pickling device includes: a pickling tank for storing acid solution and for pickling a steel strip by allowing the steel strip to travel therethrough while the steel strip is immersed in the acid solution; a heat exchanger for heating the acid solution in the pickling tank; a circulation tank for storing the acid solution, provided separately from the pickling tank; an acid-solution circulation unit configured to circulate the acid solution between the pickling tank and the acid-solution storage tank; and a control device configured to control the acid-solution circulation device to maintain a liquid level of the acid solution in the pickling tank at a level below a traveling height of the steel strip.
When a portion the plating coating weight of which is to be measured has reached an upstream position (α), a plating coating weight estimated value (We) of a surface of a steal plate (S) at a position opposed to a distance sensor (74a-74b, 84a-84d), that is, a position away from an upstream position (Ed11) by a plate width direction distance (X11-X14), is estimated and calculated by a plating coating weight estimation expression. When the portion the plating coating weight of which is to be measured has reached a downstream position (β), a plating coating weight measured value (W) is determined by setting a plate width direction distance (X21-X24) of a plating coating weight meter (53a-53d, 63a-63d) to be equal to the plate width direction distance (X11-X14). The plating coating weight estimation expression is corrected on the basis of a difference between the plating coating weight estimated value (We) and the plating coating weight measured value (W). In this manner, control precision of the plating coating weight is improved.
